package org.ofdrw.reader;

import java.io.*;
import java.nio.charset.Charset;
import java.util.Enumeration;
import java.util.zip.ZipEntry;
import java.util.zip.ZipFile;

public class ZipUtil {
    /**
     * 解压到指定目录
     */
    public static void unZipFiles(String zipPath, String descDir) throws IOException {
        unZipFiles(new File(zipPath), descDir);
    }

    /**
     * 解压文件到指定目录
     */
    @SuppressWarnings("rawtypes")
    public static void unZipFiles(File zipFile, String descDir) throws IOException {
        File pathFile = new File(descDir);
        if (!pathFile.exists()) {
            pathFile.mkdirs();
        }
//        Charset charset = StandardCharsets.UTF_8;
//        if(System.getProperties().getProperty("os.name").toUpperCase().contains("WINDOWS")){
//            charset = Charset.forName("GBK");
//        }

        // 解决zip文件中有中文目录或者中文文件
        ZipFile zip = new ZipFile(zipFile, Charset.forName("GBK"));
        for (Enumeration entries = zip.entries(); entries.hasMoreElements(); ) {
            ZipEntry entry = (ZipEntry) entries.nextElement();
            String zipEntryName = entry.getName();
            try (InputStream in = zip.getInputStream(entry)) {
                String outPath = (descDir + zipEntryName).replaceAll("\\*", "/");
                // 判断路径是否存在,不存在则创建文件路径
                int vIndex = outPath.lastIndexOf('/');
                File file;
                if (vIndex == -1) {
                    file = new File(outPath);
                } else {
                    file = new File(outPath.substring(0, vIndex));
                    if (!file.exists()) {
                        file.mkdirs();
                    }
                }
                //判断文件全路径是否为文件夹,如果是上面已经上传,不需要解压
                if (new File(outPath).isDirectory()) {
                    continue;
                }

                try (OutputStream out = new FileOutputStream(outPath)) {
                    byte[] buf1 = new byte[1024];
                    int len;
                    while ((len = in.read(buf1)) > 0) {
                        out.write(buf1, 0, len);
                    }
                }
            }
        }
    }
}
